Bloodvial Purveyor

Bloodvial Purveyor

Creature - Vampire | Power/Toughness: 5 / 6 (CMC 4)
Flying, trample
Whenever an opponent casts a spell, that player creates a Blood token. (It's an artifact with ", {T}, Discard a card, Sacrifice this artifact: Draw a card.")
Whenever Bloodvial Purveyor attacks, it gets +1/+0 until end of turn for each Blood token defending player controls.

Token: